摘要
风、光等波动性资源规模化并网发电给电力系统功率平衡带来巨大挑战。水轮机调速具有调节容量大、响应灵活等优点,是当前抑制新能源波动、支撑电网调频的关键资源,而常规水轮机调速控制主要基于输出误差反馈的PID控制方案,广域工况运行适配性差,调速响应性能难以满足当前的并网标准。针对上述问题,在传统水轮机调速系统线性模型基础之上,引入流量、水头、输出频率等状态变量构建反馈控制方案,提升了水轮机的调速响应速度及广域运行的鲁棒性。同时建立了状态空间方程,采用特征值法分析给出了反馈增益取值的建议。最后通过Simulink仿真验证所提设计方案的有效性。
Large-scaled grid-connected power generation of fluctuating resources such as wind and light brings a huge challenge to the power balance of the power system.Hydraulic turbine speed regulation has the advantages of large regulating capacity and flexible response,which is the key resource to restrain the fluctuation of new energy and support the frequency modulation of power grid.However,the conventional hydraulic turbine speed control is mainly based on the output error feedback PID control scheme,with poor adaptability to wide-area operating conditions,and the speed response performance is difficult to meet the current grid-connected standards.Aiming at the above problems,and based on the linear model of the traditional hydraulic turbine speed control system,this paper introduces state variables such as flow rate,water head,and output frequency to construct a feedback control scheme,which improves the speed control response of the turbine and the robustness of wide-area operation.Meanwhile,the state space equation is established,and the eigenvalue method is used to make analyses and present suggestions of the feedback gain value.Finally,the effectiveness of the proposed design scheme is verified by Simulink simulation.
作者
高晓明
唐国平
王瑞清
宋香杰
廖李成
杨驰
GAO Xiaoming;TANG Guoping;WANG Ruiqing;SONG Xiangjie;LIAO Licheng(Gezhouba hydroelectric power plant,China Yangtze Power Co.,Ltd.,Yichang Hubei 443002,China;Nengshida Electric Co.,Ltd.,Wuhan Hubei 430070,China)
出处
《湖北电力》
2024年第3期147-154,共8页
Hubei Electric Power
基金
中国长江电力股份有限公司科研项目(项目编号:2223020029)。
关键词
一次调频
状态反馈
特征值分析法
状态空间方程
新能源发电
水轮机
primary frequency modulation
status feedback
eigenvalue analysis method
state space equation
new energy generation
hydro-turbine
